/*
 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

#include <jvmti.h>
#include "agent_common.h"

#include "nsk_tools.h"
#include "JVMTITools.h"
#include "jvmti_tools.h"

extern "C" {

#define PASSED  0
#define STATUS_FAILED  2

const char* CLASS_NAME = "nsk/jvmti/ClassFileLoadHook/classfloadhk001";

static jint result = STATUS_FAILED;
static jvmtiEnv *jvmti = NULL;
static jvmtiEventCallbacks callbacks;

/** callback functions **/
void JNICALL
ClassFileLoadHook(jvmtiEnv *jvmti_env, JNIEnv *env, jclass class_beeing_redefined,
        jobject loader, const char* name, jobject protection_domain,
        jint class_data_len, const unsigned char* class_data,
        jint *new_class_data_len, unsigned char** new_class_data) {

    if (name != NULL && (strcmp(name, CLASS_NAME) == 0)) {
        NSK_DISPLAY1("CHECK PASSED: ClassFileLoadHook event received for the class \"%s\" as expected\n",
            name);
        result = PASSED;
    }
}
/************************/

JNIEXPORT jint JNICALL
Java_nsk_jvmti_ClassFileLoadHook_classfloadhk001_check(
        JNIEnv *env, jobject obj) {
    if (result == STATUS_FAILED)
        NSK_COMPLAIN1("TEST FAILED: no JVMTI_EVENT_CLASS_FILE_LOAD_HOOK event for the class \"%s\"\n",
            CLASS_NAME);

    return result;
}

#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_classfloadhk001(JavaVM *jvm, char *options, void *reserved) {
    return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_classfloadhk001(JavaVM *jvm, char *options, void *reserved) {
    return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_classfloadhk001(JavaVM *jvm, char *options, void *reserved) {
    return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
    /* init framework and parse options */
    if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
        return JNI_ERR;

    /* create JVMTI environment */
    if (!NSK_VERIFY((jvmti =
            nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
        return JNI_ERR;

    NSK_DISPLAY0("setting event callbacks ...\n");
    (void) memset(&callbacks, 0, sizeof(callbacks));
    callbacks.ClassFileLoadHook = &ClassFileLoadHook;
    if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks))))
        return JNI_ERR;

    NSK_DISPLAY0("setting event callbacks done\nenabling ClassFileLoadHook event ...\n");
    if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL)))
        return JNI_ERR;
    NSK_DISPLAY0("enabling ClassFileLoadHook event done\n");

    return JNI_OK;
}

}